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(No Model.) I 0. KART'ZMARK.

ELECTRIC LAMP HOLDER. I

No. 244,462. 7 Patented July 19,1881.

Wii asses.

. Inn/anion CM;- KWZSWMK/ v WW N PETERS, Fhulwutho n hen Washinglm l7. (:4

UNITED STATES PATENT OEErcE.

OTTO KARTZMARK, OF NEW YORK, N. Y., ASSIGNOR TO THE UNITED STATES ELECTRIC LIGHTING COMPANY, OF SAME PLACE.

ELECTRIC-LAMP HOLDER.

SPECIFICATION forming part of Letters Patent No. 244,462, dated July 19, 1881. Application filed March 8, 1881'. (No model.)

To all whom it may concern Be it known that I, OTTO KARTZMARK, residing in the city, county, and State of New York, have invented certain Improvements in Electric-Lamp Holders; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the drawings accompanying and forming a part of the specification.

Theobject of my invention is to bring into one complete devicea gas-burner and electric lamp, so that should it occur from any cause that the electric illuminating current is interrupted, or that the lamp, becoming injured or destroyed, is not easily replaced, another source of lightmay be ready at hand in the gas,which may be immediately turned on and'lighted in the same bracket, or in any branch thereof, without delay, and without thenecessity of altering any of its parts.

To this endI have devised a novel combination of the following elements: a gas-burner and bracket, an electric-lamp socket and sprin' g circuit-breaker specially adapted thereto, and.

an electric lamp so arranged that either the electric current or the gas-maybe used at will as the source of light. These several instrumentalities I have illustrated in combination in the accompanying drawings, in which- Figure 1 represents the complete device, embracing all the above-named parts. Fig. 2 is a view, partly in section, of a detached portion of the base; and Figs. 3, 4, and 5 are detached views of the operative portions of the spring circuit-breakin g mechanism.

K is a cylindrical block, of non-conducting material, such as ebonite or hard rubber, the central portion of which is bored out to form a tube. At one end of K is inserted a circular blockof metal, I, screw-threaded on its interior for attachment to the threaded end of a gaspipe, N, and atthe other a circular groove is out to form a hub, over which fits, by screwthreads or otherwise, the tube L of an ordinary gas-burner.

descence.

K, and form, by the prolongations b c b c, a socket for an incandescent lamp. The plates B and E are completely insulated from each otl1er,and each one is in electrical contact with one of the conductors C D of the lamp P, so that when the ends of the line-wires are connected with the said plates the current is completed through the lamps and the carbon conductor contained therein is heated to incan- Thelamp to be used with this socket is of the usual pattern, the only points necessary to observe in its construction being that the interior supporting-neck, M, shall he of sufficient height and internal diameter to fit down over the tube L without touching the same at any point, and that the conducting- Wires shall be carried down through the neck, close to the sides thereof, so that all danger of short-circuiting through the metal tube shall be avoided.

As a means of making and breaking the circuit in this device, I employ the following form of switch, which, it will be seen, is especially adapted thereto: In the side of block K acircular recess is out, through which passes the shaft F of a switch, the bearings therefor being at one end in the body of theblock and at the other in the metal plate E. Passing freely through the shaftF, and atright angles thereto, is a pin, G, with rounded or beveled ends, its

, length being nearly equal to the internal diameter of the recess. In the groove inthe upper part of block K a fiat spring, J of circular shape, is fastened by screws passing through the holes j j in its ends. The portion of the spring J directly over the switch, by being bent as shown atj, Fig. 5, is carried down into the recess, so that it is compressed by the pin G when it is carried into a vertical position by shaft F. In a notch or depression in the wall of the recess, and directly beneath the shaft F, is a conducting-strip, H, carried through the block K and unitingwith the metallic nut I. The insulating-wall of the recess is cut away on one side of the strip H, forming the demos sion g, as shown in Fig. 4.

Ihe operation of the switch is'as follows:

'The circuit through the lamp is closed byturning the shaft F, which carries around with it the pin G until the latter is broughtin contact with pin H. The spring J, now being under compression by the position of the pin G, forces it firmly down on strip H, thus insuring a good electrical contact and completing the circuit from the metal plate E and shaft F through strip H, block I, to the gas-pipe or one of the line-wires, as the case may be. If the shaft be now slightly turned from left to right, the pin working loosely therein is forced with a snap by the tension of spring J off from the strip H into the cut-away portion g, thus presenting the formation of an are as the contact-points separate. As soon as brought into contact with strip H in the depression h the pin G acts as a pawl and prevents the shaft from being turned backward. So, also, when freed from engagement with H it is driven by the force of the spring J into the cut-away portion g, which, as shown in Fig. 4, is so formed that it is impossible to complete the circuit again, except by turning the shaft around through a half-revolution from left to right. Thus the contact-surfaces are kept always clean, and as the circuit can only be broken by the snapping action of the sprin g the destructive effects of the "oltaic are which ordinarily occur in circuit-breakers are precluded.

The current for producing the light is preferably brought to the plate B by a wire attached to a hook, A. Its course from this point is indicated by the arrows in Fig. 2, being through conductor 0, to and through the lamp, and back to lineby conductor D and the switchconnections.

This device may be used at will either as a gas-bracket or a holder for an electric lamp, and forms a useful adjunct to the introduction of the incandescent systems of lighting into general use, as by means of it the ordinary gas-brackets may be utilized for supporting the lamps without impairing their utility for the original purpose for which they were designed.

Having thus illustrated and described the most improved manner of which I am at present aware of carrying out my invention, what I claim as new, and desire to secure by Letters Patent, is

1. A combined gas-burner and electric-lam p supporting base or socket adapted for attachment to and use with a gas pipe or bracket.

2. The combination of a gas-burner, an insulating electric-lamp base or socket, and an electric-circuit breaker with conductors, as described, these parts beingconnected together and arranged for attachment to and use with a gas pipe or bracket.

3. In a combined electric-lamp holder and gas-burner, a perforated insulating base or socket for an electric lamp, forming a prolongation of the gas-pipe, in combination with a burner or tube and metallic connections, leading from the line-wires, adapted to be put in connection with the terminals of an electric lamp, whereby either the gas or an electric lamp may be employed as the source of light, as set forth.

4. The combination of gas-pipe N, electriclamp base K, forming a prolongation thereof, and provided with a burner, L, and conduct ing-plates B E, and an incandescent electric lamp adapted to fit down over the burner and complete the circuit between the contact-plates, as and for the purpose set forth.

5. The combination, in an electric-lamp base or socket for use with a metallic bracket, of the insulated cylindrical block K, plates B E, metallic nut I, inserted in the block K, and a switch, F, with conducting-strip H for making and breaking the circuit between the plates and the nut, as shown.

6. In an electric-circuit breaker, a rotary shaft, F, and pin G, passing freely at right angles through the same, in combination with a spring, J, and contact-strip H, constructed as described, these parts being arranged for operation, and contained within an inclosing case or recess of insulating material, substantially as hereinbefore set forth.

In testimony whereof I have hereunto set my hand this 7 th day of March, 1881.

OTTO KARTZMARK.

Witnesses:

HENRY HINE, CHAS. H. OoRBEr'r. 

